CN101729149A - Method, device and system for photolyzing, polarizing and multiplexing optical carrier - Google Patents
Method, device and system for photolyzing, polarizing and multiplexing optical carrier Download PDFInfo
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- CN101729149A CN101729149A CN200810167346A CN200810167346A CN101729149A CN 101729149 A CN101729149 A CN 101729149A CN 200810167346 A CN200810167346 A CN 200810167346A CN 200810167346 A CN200810167346 A CN 200810167346A CN 101729149 A CN101729149 A CN 101729149A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/67—Optical arrangements in the receiver
- H04B10/671—Optical arrangements in the receiver for controlling the input optical signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/5165—Carrier suppressed; Single sideband; Double sideband or vestigial
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/67—Optical arrangements in the receiver
- H04B10/676—Optical arrangements in the receiver for all-optical demodulation of the input optical signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/06—Polarisation multiplex systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2210/00—Indexing scheme relating to optical transmission systems
- H04B2210/003—Devices including multiple stages, e.g., multi-stage optical amplifiers or dispersion compensators
Abstract
The embodiment of the invention discloses a method, a device and a system for photolyzing, polarizing and multiplexing an optical carrier, which relate to the technical field of optical communication, and can improve the frequency spectrum utilization ratio of the system, improve the tolerance limits of chromatic dispersion CD and polarization mode dispersion PMD, and simultaneously reduce the device requirement and the complexity of a receiving end. The method provided by the embodiment of the invention comprises the following steps of: separating the optical carrier into more than two paths of photon carriers at the receiving end; respectively photolyzing, polarizing and multiplexing each path of photon carrier into two paths of optical signals to be demodulated; and using the optical signals to be demodulated as feedback input signals, and respectively correspondingly regulating the incident angle of each path of photon carrier. Through the device photolyzing more than two paths of photon carriers and combining photolysis, polarization and multiplexing, the embodiment of the invention enables an optical carrier signal to be decomposed into more than four paths in an optical modulation format to be processed, and a DQPSK demodulator can be directly used on an optical wave for carrying out time delay interference detection to obtain an output signal.
Description
Technical field
The present invention relates to the optical communication technique field, particularly relate to a kind of methods, devices and systems of photodissociation palarization multiplexing light carrier.
Background technology
Development along with optical communication technique, single channel speed improves day by day, met or exceeded 40Gbps at present, the raising of speed must be to the availability of frequency spectrum of system, photoelectric device and to chromatic dispersion (Chromatic Dispersion, CD), (Polarization Mode Dispersion, tolerance limit PMD) has had higher requirement in polarization mode dispersion.
Referring to Fig. 1, in the prior art, (Polarization Beam Splitter, PBS) the photodissociation palarization multiplexing obtains signal x1 and x2 to the palarization multiplexing modulation signal of a light carrier by polarization beam apparatus 101 at receiving terminal.Adopt least mean-square error to estimate MSE algorithm 105, the inverse matrix of channel estimated by demodulation multiplexer DMUX102, the channel reverse Matrix Estimation by demodulation after the mean square error a1 and the a2 control of signal, demodulation multiplexer DMUX102 output signal y1 and y2; After y1 and y2 be converted to signal of telecommunication s1, s2 by photodiode (103A, 103B) respectively, be received machine RX (104A, 104B) demodulation output, realize demodulation function signal by receiver RX.
What prior art adopted is that light carrier is carried out the availability of frequency spectrum that palarization multiplexing improves system, carry out demodulation again after the palarization multiplexing modulation signal is converted to the signal of telecommunication, and control the various parameters of DMUX demodulation multiplexer as feedback input signal with the mean square deviation of restituted signal, very high to the analog to digital converter (ADC, Analog toDigital Convertor) and the requirement of other devices; And because the single carrier palarization multiplexing is branch 2 road transmission signals, the speed of every road signal still can be very high, even can to a certain degree improve the availability of frequency spectrum by sign indicating number type, filter adjustment, but this raising is very limited, and is easy to bring damage to signal.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of methods, devices and systems of photodissociation palarization multiplexing light carrier, can when improving chromatic dispersion CD and polarization mode dispersion PMD tolerance limit, reduce requirement on devices and complexity in the availability of frequency spectrum that improves system to receiving terminal.
For achieving the above object, the embodiment of the invention is achieved by the following technical solution:
On the one hand, provide a kind of method of photodissociation palarization multiplexing light carrier, comprising:
At receiving terminal light carrier is separated into the above photon carrier wave of two-way;
To every road photon carrier wave respectively the photodissociation palarization multiplexing go out two-way light signal to be demodulated;
, respectively the incidence angle of tackling described every road photon carrier wave is regulated as feedback input signal with described light signal to be demodulated.
On the other hand, provide a kind of device of photodissociation palarization multiplexing light carrier, comprising:
Photon carrier separation device is used at receiving terminal light carrier being separated into the above light carrier of two-way;
Polarization beam apparatus PBS, be used for to the isolated every road of described photon carrier separation device photon carrier wave respectively the photodissociation palarization multiplexing go out two-way light signal to be demodulated;
Feedback processing modules and Polarization Control module PC are used for described light signal to be demodulated by Polarization Control module PC the incidence angle of tackling described every road photon carrier wave being regulated respectively as feedback input signal.
Again on the one hand, provide a kind of system of photodissociation palarization multiplexing light carrier, comprising:
The transmitting terminal device, be used for light carrier being separated into the above photon carrier signal of two-way at transmitting terminal, every road photon carrier signal is modulated two-way palarization multiplexing modulation signal respectively, with described palarization multiplexing modulation signal respectively correspondence close Shu Houzai and close ripple, still export with light carrier;
Receiving end device, be used for light carrier being separated into the above photon carrier signal of two-way at receiving terminal, to every road photon carrier signal respectively the photodissociation palarization multiplexing go out two-way light signal to be demodulated, and with described light signal to be demodulated as feedback input signal, by Polarization Control module PC the incidence angle of tackling described every road photon carrier wave is regulated respectively.
By above technical scheme as can be known, by light carrier being separated into the above photon carrier wave of two-way at receiving terminal, to every road photon carrier wave respectively the photodissociation palarization multiplexing go out two-way light signal to be demodulated, with the incidence angle of described light signal to be demodulated as the every road of the corresponding respectively adjusting of feedback input signal photon carrier wave, optical carrier is decomposed into more than 4 the tunnel under optical modulation formats, line speed is reduced to original below 1/4, thereby can be in the availability of frequency spectrum that improves system, when improving chromatic dispersion CD and polarization mode dispersion PMD tolerance limit, need not under form of light waves, to finish the photodissociation palarization multiplexing, reduce requirement on devices and complexity receiving terminal through complicated calculating.
Description of drawings
Fig. 1 is the structure chart of the photodissociation palarization multiplexing receiving end device of prior art;
The structure drawing of device of the photodissociation palarization multiplexing light carrier that Fig. 2 provides for the embodiment of the invention;
The photon carrier separation device structure chart that Fig. 3 provides for the embodiment of the invention;
A kind of structure drawing of device of optimizing photodissociation palarization multiplexing light carrier that Fig. 4 provides for the embodiment of the invention;
The method flow diagram of the photodissociation palarization multiplexing light carrier that Fig. 5 provides for the embodiment of the invention;
The transmitting terminal that Fig. 6 provides for the embodiment of the invention generates the structure drawing of device of light carrier;
The system schematic of the photodissociation palarization multiplexing light carrier that Fig. 7 provides for the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the technical scheme that the embodiment of the invention provides is described in further detail.Need to prove; for the convenience of narrating; the technical scheme of the embodiment of the invention is light carrier to be separated into two-way photon carrier wave describe, and those skilled in the art is appreciated that fully light carrier is separated into the above photon carrier wave of two-way all should be encompassed within protection scope of the present invention.
Referring to Fig. 2, the device of the photodissociation palarization multiplexing light carrier that Fig. 2 provides for the embodiment of the invention comprises:
Photon carrier separation device 210 is used at receiving terminal light carrier being separated into the above photon carrier wave of two-way;
Polarization beam apparatus PBS (220A, 220B), be used for to described photon carrier separation device 210 isolated every road photon carrier waves respectively the photodissociation palarization multiplexing go out two-way light signal to be demodulated;
Feedback processing modules (230A, 230B) and Polarization Control module PC (240A, 240B), be used for described light signal to be demodulated by Polarization Control module PC (240A, 240B) incidence angle of tackling described every road photon carrier wave being regulated respectively as feedback input signal.
Feedback processing modules with the signal feedback of PBS output to PC, from feedback signal, detect the pilot tone id signal, this pilot signal is the perturbation signal that adds at transmitting terminal, detect the incidence angle that the pilot tone id signal is used to calculate the light signal that enters polarization beam apparatus PBS, the described incidence angle that enters the light signal of polarization beam apparatus PBS is regulated.
Referring to Fig. 3, described photon carrier separation device 210 comprises:
Merit sub-module 301 is used for described light carrier is separated into the above light signal of two bundles;
The filter of two above different center frequency (302A, 302B) is used for the every bundle light signal after the described separation is carried out respectively the filtering of different center frequency, the above photon carrier signal of the two-way that output wavelength is different.
Light carrier is divided into the above light signal of two bundles through merit sub-module (splitter) 301, then every bundle light signal is entered filter respectively and carry out Filtering Processing, filter 1 has different centre frequencies with filter 2, thereby the signal 1 and the signal 2 of filter output are the two-beam signal of different wave length, have realized the separation of subcarrier.
Every road photon carrier signal after the separation is used polarization beam apparatus PBS photodissociation palarization multiplexing respectively, obtains the light signal to be demodulated of X polarization and Y polarization respectively, and these light signals to be demodulated are carried out respectively exporting after the demodulation.
A kind of optimization embodiment, referring to Fig. 4, the demodulator that the device of the photodissociation palarization multiplexing light carrier that the embodiment of the invention provides adopts is differential quadrature phase keying (DQPSK) DQPSK demodulator (450A, 450B, 450C, 450D), use DQPSK (Differential Quadrature Phase Shifted Keying) demodulator to carry out demodulation to every road light signal to be demodulated, directly in the enterprising line delay coherent demodulation of light wave, remove carrier wave, obtain phase information, separate mapping by phase information at last and obtain information bit.
QPSK is the demodulator that carrier phase is modulated, and two paths of signals (bit sequence) has 4 kinds of possibilities: 00,01,10,11, and according to the difference of this two paths of signals bit sequence, carrier wave is selected 4 kinds of different phase places, and promptly phase place is corresponding one by one with information bit.DQPSK does difference on the QPSK basis, make former and later two constantly the difference of the phase place of signals corresponding to sending sequence, the phase difference of signal is corresponding one by one with information bit promptly, DQPSK is compared with QPSK, can be directly relevant at the enterprising line delay of light wave, remove carrier wave, directly obtain phase information, demodulate information bit then, the QPSK coherent demodulation of then can not delaying time.
A kind of optimization embodiment, still referring to Fig. 4, the device of the photodissociation palarization multiplexing light carrier that the embodiment of the invention provides also comprises: a N level Polarization Control module PC and Variable delay line, be used for described light signal to be demodulated as feedback input signal, the corresponding light signal incidence angle that enters the Variable delay line of regulating by Polarization Control module PC, control the polarization mode dispersion PMD compensation rate of Variable delay line simultaneously, polarization mode dispersion PMD to described every road photon carrier wave carries out the compensation of N level respectively, and described N is the positive integer more than or equal to 1.
Feedback processing modules feeds back to N level PC and Variable delay line respectively with the signal of PBS output, from feedback input signal, detect and characterize the PMD signal, detect sign PMD signal and be used to calculate PMD, thereby regulate the light signal incidence angle that enters the Variable delay line by PC, control the PMD compensation rate of Variable delay line simultaneously.
Choosing of the level n of compensation PMD is that size according to real system is influenced by PMD decides.If it is bigger that system is influenced by PMD, then need multistage PMD compensation, and if system influenced by PMD less, then the PMD compensation can be selected the PC and the compensation of Variable delay line of less progression, or it goes without doing, and PMD compensates.
The device of the photodissociation palarization multiplexing two-photon carrier wave that the embodiment of the invention provides, at receiving terminal light carrier is separated into the above photon carrier signal of two-way by photon carrier separation device, by PBS to every road photon carrier signal respectively the photodissociation palarization multiplexing go out two-way light signal to be demodulated, the device that the above subcarrier of this photodissociation two-way combines with the photodissociation palarization multiplexing, light carrier is decomposed into more than 4 the tunnel under optical modulation formats, line speed is reduced to original below 1/4, compared with prior art, can further improve the availability of frequency spectrum of system, improve chromatic dispersion CD and polarization mode dispersion PMD tolerance limit, and generate the incidence angle of the every road of the parameter regulation photon carrier wave of control signal control PC by feedback processing modules, need not under form of light waves, to finish the photodissociation palarization multiplexing, reduced requirement on devices and complexity receiving terminal through complicated calculating.Simultaneously, use N level Polarization Control module PC and Variable delay line that the polarization mode dispersion PMD of every road photon carrier wave is carried out the compensation of N level, and use the DQPSK demodulator directly to interfere detection to obtain output signal at the enterprising line delay of light wave to the every road light signal to be demodulated that forms, can further improve the availability of frequency spectrum of system.
Referring to Fig. 5, the embodiment of the invention also provides a kind of method of photodissociation palarization multiplexing light carrier, comprising:
Use photon carrier separation device that light carrier is separated into the above photon carrier signal of two-way at receiving terminal, after at first described light carrier being separated into the above light signal of two bundles by the merit sub-module (Splitter) in the photon carrier separation device, filter by different center frequency carries out Filtering Processing respectively to described every bundle light signal again, the above photon carrier signal of the two-way that output wavelength is different.
For the light carrier received signal after the palarization multiplexing modulation that obtains suiting the requirements, a kind of method is: at transmitting terminal light carrier is separated into the above photon carrier wave of two-way; Every road photon carrier wave is modulated two-way palarization multiplexing modulation signal respectively; With the described two-way palarization multiplexing modulation signal that modulates respectively correspondence close Shu Houzai and close ripple, still export with light carrier.
Device to transmitting terminal describes below, referring to Fig. 6, light source LD601 (Laser Diode, laser) sends standard wave length's light carrier (SC, Sub-Carrier), through modulator 602 (Modulator, Mod) modulation produces the photon carrier wave SC-A and the SC-B of two non-standard wavelength, for avoiding the intersymbol interference (ISI) between the different wave length, the centre frequency of two subcarriers must be separated, the center frequency difference that can select two subcarrier SC-A and SC-B is 20GHz, and frequency difference certainly will be too greatly a kind of waste to frequency spectrum, and 20GHz is in the availability of frequency spectrum and a better compromise that overcomes intersymbol interference.
The two photon carrier waves that modulation generates for Mod, adopt comb filter 603 (IL, Interleaver) subcarrier with these two different center frequency separates, utilize X, the orthogonal property of Y polarization state, to every way carrier wave respectively by polarization beam apparatus PBS (604A, 604B) palarization multiplexing is X polarization and Y polarization signal, and obtain 4 road modulation signals altogether through modulators modulate respectively, the amount of information of unit interval becomes original 4 times, again by polarization beam combiner PBC (606A, 606B) close bundle respectively, at last by wave multiplexer 607 (Coupler) these two palarization multiplexings (Polarization Division Multiple, PDM) the photon carrier wave after the modulation closes ripple output, obtains two-photon carrier wave PDM modulation signal.
Need to prove that laser produces and meets ITU specified standard wavelength, if one road signal, signal is modulated onto on this standard wave length; Owing to need to generate the two-photon carrier wave, need 2 road carrier waves, this two-way carrier wave lays respectively at original standard wave length both sides, has certain wavelength difference with the standard wave length, therefore is called non-standard wavelength.Can adopt Mach-Zehnder modulators (MZM) the center frequency difference of obtaining is the two photon carrier waves of 20GHz.
Also need to prove, can also adopt as shown in Figure 6 DQPSK modulator (605A, 605B, 605C, 605D) to the X polarization of every way carrier wave palarization multiplexing and Y polarization signal, be modulated into the DQPSK signal of palarization multiplexing respectively, close Shu Houzai then respectively and close ripple, export with two-photon carrier wave PDM-DQPSK signal.
A kind of optimization embodiment, if export with two-photon carrier wave PDM-DQPSK signal at transmitting terminal, then at receiving terminal, 4 road light signals to be demodulated to depolarization after multiplexing, adopt the DQPSK demodulator to carry out demodulation respectively,, remove carrier wave directly in the enterprising line delay coherent demodulation of light wave, obtain phase information, separate mapping by phase information at last and obtain information bit.
The feedback method for treating that the embodiment of the invention adopts is: add pilot tone id signal (perturbation signal) at transmitting terminal respectively by the palarization multiplexing modulation signal to every road photon carrier signal, this pilot tone id signal can or be modulated afterwards before every road photon carrier wave being carried out the palarization multiplexing modulation, in the modulated process and add.At receiving terminal with every road light signal to be demodulated as feedback input signal, by detecting the pilot tone id signal, corresponding by feedback processing modules with the signal feedback of PBS output to PC, from feedback signal, detect the pilot tone id signal, according to the incidence angle that described pilot tone id signal calculating enters the light signal of polarization beam apparatus PBS, respectively the described incidence angle that enters the light signal of polarization beam apparatus PBS is regulated by Polarization Control module PC.
Polarization mode dispersion PMD tolerance limit for further raising system, a kind of preferred embodiment, can before the polarization beam apparatus PBS of receiving terminal, add N level PC and Variable delay line, with described every road light signal to be demodulated as feedback input signal, the corresponding light signal incidence angle that enters the Variable delay line of regulating by Polarization Control module PC, control the polarization mode dispersion PMD compensation rate of Variable delay line simultaneously, polarization mode dispersion PMD to described every road photon carrier wave carries out the compensation of N level respectively, and described N is the positive integer more than or equal to 1.
Choosing of compensation PMD level n is that size according to real system is influenced by PMD decides.If it is bigger that system is influenced by PMD, then need multistage PMD compensation, and if system influenced by PMD less, then the PMD compensation can be selected the PC and the compensation of Variable delay line of less progression, or it goes without doing PMD compensation.
The method of the photodissociation palarization multiplexing light carrier that the embodiment of the invention provides, by light carrier being separated into the above photon carrier signal of two-way at receiving terminal, to every road photon carrier signal respectively the photodissociation palarization multiplexing go out two-way light signal to be demodulated; Optical carrier is decomposed into more than 4 the tunnel under optical modulation formats, line speed is reduced to original below 1/4, compared with prior art, can further improve the availability of frequency spectrum of system, improve chromatic dispersion CD and polarization mode dispersion PMD tolerance limit, and with described every road light signal to be demodulated as feedback input signal, respectively the incidence angle of tackling described every road photon carrier wave is regulated, need not under form of light waves, to finish the photodissociation palarization multiplexing, reduced requirement on devices and complexity receiving terminal through complicated calculating.Simultaneously, polarization mode dispersion PMD to every road photon carrier wave carries out the compensation of N level, and use the DQPSK demodulator directly to interfere to detect to the every road that forms light signal to be demodulated to obtain output signal, can further improve the availability of frequency spectrum of system at the enterprising line delay of light wave.
Referring to Fig. 7, the embodiment of the invention also provides a kind of system of photodissociation palarization multiplexing light carrier, comprising:
Transmitting terminal device 710, be used for light carrier being separated into the above photon carrier signal of two-way at transmitting terminal, every road photon carrier signal is modulated two-way palarization multiplexing modulation signal respectively, with described palarization multiplexing modulation signal respectively correspondence close Shu Houzai and close ripple, still export with two light carriers;
Receiving end device 720, be used for light carrier being separated into the above photon carrier signal of two-way at receiving terminal, to every road photon carrier signal respectively the photodissociation palarization multiplexing go out two-way light signal to be demodulated,, by Polarization Control module PC the incidence angle of tackling described every road photon carrier wave is regulated respectively as feedback input signal with every road light signal to be demodulated.
At transmitting terminal, light source sends a monochromatic light carrier wave, produce the photon carrier wave of two above different wave lengths through modulators modulate, the center frequency difference of the centre frequency of per two subcarriers is 20GHz, adopt the dressing filter that the subcarrier of these different center frequency is separated, utilize the orthogonal property of X, Y polarization state, every way carrier wave is decomposed into X polarization and Y polarised light carrier wave by polarization beam apparatus PBS respectively, and respectively through after the modulators modulate again by polarization beam combiner PBC respectively correspondence close bundle, close ripple output by wave multiplexer at last, still export with light carrier.
Use photon carrier separation device that light carrier is separated into the above photon carrier wave of two-way at receiving terminal, described photon carrier separation device carries out the above photon carrier signal of the different two-way of Filtering Processing output wavelength by the filter of different center frequency respectively to every bundle light signal after at first light carrier being separated into the above light signal of two bundles; Every road photon carrier signal is carried out the photodissociation palarization multiplexing respectively form light signal to be demodulated more than 4 tunnel.
Add the pilot tone id signal at transmitting terminal respectively by palarization multiplexing modulation signal to every road photon carrier signal; In feedback signal, detect this pilot tone id signal at receiving terminal, calculate the incidence angle of the light signal that enters polarization beam apparatus PBS according to described pilot tone id signal, the described incidence angle that enters the light signal of polarization beam apparatus PBS is regulated aligning by Polarization Control module PC, can be in the availability of frequency spectrum that improves system, when improving chromatic dispersion CD and polarization mode dispersion PMD tolerance limit, reduce the requirement on devices and the complexity of receiving terminal.
Polarization mode dispersion PMD tolerance limit for further raising system, described receiving end device with every road light signal to be demodulated as feedback input signal, polarization mode dispersion PMD to described every road photon carrier wave carries out the compensation of N level respectively, and described N is the positive integer more than or equal to 1.
Concrete grammar can for, before the polarization beam apparatus PBS of receiving terminal, add N level PC and Variable delay line, feedback processing modules feeds back to PC at different levels and Variable delay line with the output signal of PBS respectively as feedback signal, from feedback input signal, detect and characterize the PMD signal, detect sign PMD signal and be used to calculate PMD, thereby regulate the light signal incidence angle that enters the Variable delay line by PC, control the PMD compensation rate of Variable delay line simultaneously.
Choosing of compensation PMD level n is that size according to real system is influenced by PMD decides.If it is bigger that system is influenced by PMD, then need multistage PMD compensation, and if system influenced by PMD less, then the PMD compensation can be selected the PC and the compensation of Variable delay line of less progression, or it goes without doing PMD compensation.
Be the availability of frequency spectrum of further raising system, can also in the transmitting terminal device, use the DQPSK modulator modulate the DQPSK modulation signal of palarization multiplexing respectively described every road photon carrier signal; In receiving end device, use the DQPSK demodulator to carry out demodulation,, remove carrier wave, obtain phase information, separate mapping by phase information at last and obtain information bit directly in the enterprising line delay coherent demodulation of light wave to every road light signal to be demodulated.
More than to the method for the photodissociation palarization multiplexing light carrier that the embodiment of the invention provided, device and system are described in detail, the present invention mainly is by at receiving terminal light carrier being separated into the above photon carrier wave of two-way, to every road photon carrier wave respectively the photodissociation palarization multiplexing go out two-way light signal to be demodulated, and with the incidence angle of every road light signal to be demodulated as the every road of the corresponding respectively adjusting of feedback input signal photon carrier wave, optical carrier is decomposed under optical modulation formats goes more than 4 the tunnel to handle, need not under form of light waves, to finish the photodissociation palarization multiplexing through complicated calculating, can be in the availability of frequency spectrum that improves system, when improving chromatic dispersion CD and polarization mode dispersion PMD tolerance limit, reduce the requirement on devices and the complexity of receiving terminal.The explanation of embodiment just is used for helping to understand method of the present invention and thought thereof; Anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection range with claim.
Claims (15)
1. the method for a photodissociation palarization multiplexing light carrier is characterized in that, comprising:
At receiving terminal light carrier is separated into the above photon carrier wave of two-way;
To every road photon carrier wave respectively the photodissociation palarization multiplexing go out two-way light signal to be demodulated;
, respectively the incidence angle of tackling described every road photon carrier wave is regulated as feedback input signal with described light signal to be demodulated.
2. method according to claim 1 is characterized in that, described method also comprises:
As feedback input signal, respectively the polarization mode dispersion PMD that tackles described every road photon carrier wave is carried out the compensation of N level with described light signal to be demodulated, described N is the positive integer more than or equal to 1.
3. method according to claim 1 and 2 is characterized in that, described method also comprises:
At transmitting terminal light carrier is separated into the above photon carrier wave of two-way;
Every road photon carrier wave is modulated two-way palarization multiplexing modulation signal respectively;
With described palarization multiplexing modulation signal respectively correspondence close Shu Houzai and close ripple, still export with light carrier.
4. method according to claim 3 is characterized in that, at receiving terminal or transmitting terminal light carrier is separated into two-way photon carrier wave, and the center frequency difference of described two-way photon carrier signal is 20GHz.
5. method according to claim 1 is characterized in that, describedly at receiving terminal the step that light carrier is separated into the above photon carrier signal of two-way is comprised:
At receiving terminal light carrier is separated into the above light signal of two bundles;
Every bundle light signal is carried out the filtering of different center frequency respectively, the above photon carrier signal of the two-way that output wavelength is different.
6. method according to claim 3 is characterized in that, described method also comprises:
At transmitting terminal the palarization multiplexing modulation signal of described every road photon carrier wave is added the pilot tone id signal respectively;
In described feedback input signal, detect this pilot tone id signal at receiving terminal,, regulate tackling the described incidence angle that enters the light signal of polarization beam apparatus PBS according to the incidence angle that described pilot tone id signal calculating enters the light signal of polarization beam apparatus PBS.
7. method according to claim 2 is characterized in that, described with described light signal to be demodulated as feedback input signal, respectively the polarization mode dispersion PMD that tackles described every road photon carrier wave is carried out the step of N level compensation, comprising:
In described feedback input signal, detect and characterize polarization mode dispersion PMD signal, according to described sign polarization mode dispersion PMD calculated signals polarization mode dispersion PMD, correspondence is regulated the light signal incidence angle that enters the Variable delay line, controls the polarization mode dispersion PMD compensation rate of Variable delay line simultaneously.
8. method according to claim 1 and 2 is characterized in that, described method also comprises:
Described light signal to be demodulated is directly interfered at the enterprising line delay of light wave, detect and obtain demodulated output signal.
9. the device of a photodissociation palarization multiplexing light carrier is characterized in that, comprising:
Photon carrier separation device is used at receiving terminal light carrier being separated into the above photon carrier wave of two-way;
Polarization beam apparatus PBS, be used for to the isolated every road of described photon carrier separation device photon carrier wave respectively the photodissociation palarization multiplexing go out two-way light signal to be demodulated;
Feedback processing modules and Polarization Control module PC are used for described light signal to be demodulated by Polarization Control module PC the incidence angle of tackling described every road photon carrier wave being regulated respectively as feedback input signal.
10. device according to claim 9 is characterized in that, described device also comprises:
N level Polarization Control module PC and Variable delay line, be used for described light signal to be demodulated as feedback input signal, the corresponding light signal incidence angle that enters the Variable delay line of regulating by Polarization Control module PC, control the polarization mode dispersion PMD compensation rate of Variable delay line simultaneously, polarization mode dispersion PMD to described every road photon carrier wave carries out the compensation of N level respectively, and described N is the positive integer more than or equal to 1.
11. device according to claim 9 is characterized in that, described photon carrier separation device comprises:
The merit sub-module is used for described light carrier is separated into the above light signal of two bundles;
The filter of two above different center frequency is used for the every bundle light signal after the described separation is carried out respectively the filtering of different center frequency, the above photon carrier signal of the two-way that output wavelength is different.
12., it is characterized in that described device also comprises according to claim 9 or 10 described devices:
Differential quadrature phase keying (DQPSK) DQPSK demodulator is used for described light signal to be demodulated is directly interfered at the enterprising line delay of light wave, detects and obtains demodulated output signal.
13. the system of a photodissociation palarization multiplexing light carrier is characterized in that, comprising:
The transmitting terminal device, be used for light carrier being separated into the above photon carrier signal of two-way at transmitting terminal, every road photon carrier signal is modulated two-way palarization multiplexing modulation signal respectively, with described palarization multiplexing modulation signal respectively correspondence close Shu Houzai and close ripple, still export with light carrier;
Receiving end device, be used for light carrier being separated into the above photon carrier signal of two-way at receiving terminal, to every road photon carrier signal respectively the photodissociation palarization multiplexing go out two-way light signal to be demodulated,, by Polarization Control module PC the incidence angle of tackling described every road photon carrier wave is regulated respectively as feedback input signal with described light signal to be demodulated.
14. system according to claim 13 is characterized in that,
Described receiving end device, also be used for described light signal to be demodulated as feedback input signal, the corresponding light signal incidence angle that enters the Variable delay line of regulating by Polarization Control module PC, control the polarization mode dispersion PMD compensation rate of Variable delay line simultaneously, polarization mode dispersion PMD to described every road photon carrier wave carries out the compensation of N level respectively, and described N is the positive integer more than or equal to 1.
15. system according to claim 13 is characterized in that,
Described transmitting terminal device also is used for using the DQPSK modulators modulate to go out the DQPSK modulation signal of palarization multiplexing respectively to described palarization multiplexing modulation signal;
Described receiving end device also is used for using the DQPSK demodulator directly to interfere at the enterprising line delay of light wave respectively to described light signal to be demodulated, detects and obtains demodulated output signal.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810167346A CN101729149A (en) | 2008-10-22 | 2008-10-22 | Method, device and system for photolyzing, polarizing and multiplexing optical carrier |
| BRPI0919797A BRPI0919797A2 (en) | 2008-10-22 | 2009-06-23 | method, device, and system for optical carrier optical polarization division multiplexing. |
| PCT/CN2009/072405 WO2010045802A1 (en) | 2008-10-22 | 2009-06-23 | A method, device and system for optic-demodulating the optical carrier of polarization division multiplexing |
| EP09821523A EP2352239A4 (en) | 2008-10-22 | 2009-06-23 | A method, device and system for optic-demodulating the optical carrier of polarization division multiplexing |
| US13/091,843 US20110206375A1 (en) | 2008-10-22 | 2011-04-21 | Method, device, and system for optical polarization division multiplexing of optical carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810167346A CN101729149A (en) | 2008-10-22 | 2008-10-22 | Method, device and system for photolyzing, polarizing and multiplexing optical carrier |
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| Publication Number | Publication Date |
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| CN101729149A true CN101729149A (en) | 2010-06-09 |
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| CN200810167346A Pending CN101729149A (en) | 2008-10-22 | 2008-10-22 | Method, device and system for photolyzing, polarizing and multiplexing optical carrier |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20110206375A1 (en) |
| EP (1) | EP2352239A4 (en) |
| CN (1) | CN101729149A (en) |
| BR (1) | BRPI0919797A2 (en) |
| WO (1) | WO2010045802A1 (en) |
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| CN104243047B (en) * | 2014-09-19 | 2018-01-12 | 电子科技大学 | A kind of PDM DQPSK/SAC signal exchange systems |
| CN113206703A (en) * | 2021-04-19 | 2021-08-03 | 烽火通信科技股份有限公司 | Wavelength division multiplexing chromatic dispersion and polarization mode dispersion monitoring method and device |
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Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5035400A (en) * | 1999-05-20 | 2000-12-12 | University Of Southern California | Polarization-division multiplexing based on power encoding of different polarization channels |
| US6525857B1 (en) * | 2000-03-07 | 2003-02-25 | Opvista, Inc. | Method and apparatus for interleaved optical single sideband modulation |
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| DE10147892B4 (en) * | 2001-09-28 | 2004-02-05 | Siemens Ag | Method for transmitting at least one first and second data signal in polarization multiplex in an optical transmission system |
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| US7450863B2 (en) * | 2003-06-18 | 2008-11-11 | Lucent Technologies Inc. | Optical receiver for wavelength-division-multiplexed signals |
| US7315584B1 (en) * | 2003-12-17 | 2008-01-01 | Nortel Networks Limited | Coherent receiver |
| US6917031B1 (en) * | 2004-02-17 | 2005-07-12 | Nortel Networks Limited | Method for quadrature phase angle correction in a coherent receiver of a dual-polarization optical transport system |
| ITMI20040446A1 (en) * | 2004-03-09 | 2004-06-09 | Marconi Comm Spa | METHOD AND APPARATUS SYSTEM FOR COMPENSATION OF PMD AND CONTEMPORARY DEMULTIPLATION OF PAIRS OF MULTIPLE SIGNALS ION POLARIZATION |
| US7343100B2 (en) * | 2004-05-28 | 2008-03-11 | General Photonics Corporation | Optical communications based on optical polarization multiplexing and demultiplexing |
| US7724987B2 (en) * | 2004-12-13 | 2010-05-25 | Fujitsu Limited | Method and apparatus for dynamic polarization control |
-
2008
- 2008-10-22 CN CN200810167346A patent/CN101729149A/en active Pending
-
2009
- 2009-06-23 EP EP09821523A patent/EP2352239A4/en not_active Withdrawn
- 2009-06-23 WO PCT/CN2009/072405 patent/WO2010045802A1/en active Application Filing
- 2009-06-23 BR BRPI0919797A patent/BRPI0919797A2/en not_active IP Right Cessation
-
2011
- 2011-04-21 US US13/091,843 patent/US20110206375A1/en not_active Abandoned
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Also Published As
| Publication number | Publication date |
|---|---|
| US20110206375A1 (en) | 2011-08-25 |
| EP2352239A1 (en) | 2011-08-03 |
| BRPI0919797A2 (en) | 2015-12-15 |
| EP2352239A4 (en) | 2012-07-04 |
| WO2010045802A1 (en) | 2010-04-29 |
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